bathos

Dictionary.com/bathos

n.

1.
1. An abrupt, unintended transition in style from the exalted to the commonplace, producing a ludicrous effect.
2. An anticlimax.
2.
1. Insincere or grossly sentimental pathos: “a richly textured man who... can be... sentimental to the brink of bathos” (Kenneth L. Woodward).
2. Banality; triteness.